Journal article

A search for the rare leptonic decays B ->mu( )nu(mu) and B -> e( )nu(e)

N Satoyama, K Abe, I Adachi, H Aihara, D Anipko, AM Bakich, E Barberio, I Bedny, K Belous, U Bitenc, I Bizjak, A Bondar, A Bozek, M Bracko, TE Browder, M-C Chang, P Chang, A Chen, WT Chen, BG Cheon Show all

PHYSICS LETTERS B | ELSEVIER SCIENCE BV | Published : 2007

Abstract

We present a search for the decays B+ → μ+ νμ and B+ → e+ νe in a 253 fb-1 data sample collected at the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB asymmetric-energy B factory. We find no significant evidence for a signal and set 90% confidence level upper limits of B (B+ → μ+ νμ) < 1.7 × 10-6 and B (B+ → e+ νe) < 9.8 × 10-7. © 2007 Elsevier B.V. All rights reserved.